I would ask that they either get locking sleepers ( I use to have a pair) or to take them out before they come. they are a coking hazard to all the children. It is my responsibility to keep all the children safe not to make sure they are "pretty".
Why would a parent put expensive earrings on a child, when they are just sending them to daycare. I understand if it was a special outing (dinner etc.), but daycare.